With the Tri shield fixed sometimes they were set to the drivers view! The drivers height would play apart in this! I’m over six on my post car I have the mirrors set back but not to restrict the vent window! On my buddies car he is 5-6 we set the mirrors more forward! You have 2 to 2 3/4!? margin! If your starting with a door that doesn’t or hasn’t been drilled I would place them where you like! On my post car I have the passenger side mirror set back about a 1/2 more then the drivers side mirror! I will try to get pictures and measurements!